mongoDB数据库中未存储数据–Node.js

1. 检查连接数据库的URL是否正确，并尝试重新连接。

const mongoose = require('mongoose'); mongoose.connect('mongodb://localhost/mydatabase', {useNewUrlParser: true});

2. 确定模型定义与实际数据存储的一致性。

const mongoose = require('mongoose'); const Schema = mongoose.Schema;

const userSchema = new Schema({ name: String, age: Number });

const User = mongoose.model('User', userSchema);

const newUser = new User({ name: 'John Doe', age: 30 });

newUser.save(function(err, user) { if (err) { console.log(err); } else { console.log('User saved to database:', user); } });

3. 使用mongoose.connect()的回调函数以确保连接成功后再进行数据操作。

const mongoose = require('mongoose'); const Schema = mongoose.Schema;

const userSchema = new Schema({ name: String, age: Number });

const User = mongoose.model('User', userSchema);

mongoose.connect('mongodb://localhost/mydatabase', {useNewUrlParser: true}, function(err) { if (err) { console.log(err); } else { const newUser = new User({ name: 'John Doe', age: 30 });

newUser.save(function(err, user) {
  if (err) {
    console.log(err);
  } else {
    console.log('User saved to database:', user);
  }
});

} });